dianne feinstein, the democrat who chairs the senate intelligence committee, warned that shedding more light on who's being surveiled would destroy the wiretapping program which she says has worked well. >> four years, 100 arrest it prevent something from happening in -- arrests to prevent something from happening in the united states, some of which comes from this program. so i think it's a vital program. >> reporter: conservative analyst cliff may says a wide dragnet is worth the cost. >> let's suppose you were a pakistani immigrant here. you don't have your green card yet. you call your uncle in lahor, yes, you could get caught up. maybe your uncle is just a tailor. if he's a member of the taliban, maybe it's true that somebody think we need to ask questions of this person. >> reporter: if you're talking to the uncle in lahor and you're innocent, you're still caught up -- >> you're not caught up in the sense that you're going to jail. you're not caught up in the sense that anything bad is going to happen to you. >> that was brian todd reporting. >>> they're the littlest pawns in a p